At the time the &quot;License Info&quot; comment was posted, procmail's license wasn't particularly clear on some Open Source points. The current version is dual licensed under the GPL and Artistic licenses, so that comment should be considered obsolete.

Use this software package at your own risk. The programmer cannot
be held liable for any incurred damages, directly or indirectly due to
the use or inability to use this software.

You are encouraged to distribute this package freely. This package or
any part thereof or any work derived from it, is however not to be sold
(minor transfer costs excepted) or included in any commercially sold software
package (if you want to do this anyway, contact me (address below), and we'll
work something out).

If you distribute it, please leave the package intact. You are allowed to
take parts from this distribution and distribute these separately as long
as you retain the copyright messages. If you redistribute any part of this
package in a modified form, be sure to mark the parts you changed.
If you have some important changes that might be useful to the rest of the
world, contact me instead.